Word Origin for wanton

C13 wantowen (in the obsolete sense: unmanageable, unruly): from wan- (prefix equivalent to un-1; related to Old English wanian to wane) + -towen, from Old English togen brought up, from tēon to bring up

As Flies to wanton Boyes are we to th' Gods, They kill vs for their sport. [Shakespeare, "Lear," 1605]

Especially of sexual indulgence from late 14c. The only English survival of a once-common Germanic negating prefix still active in Dutch (cf. wanbestuur "misgovernment," wanluid "discordant sound"), German (wahn-), etc. Related: Wantonly; wantonness.